Stationary concave screen



5, 194 w. F. MacGREGoR 2,409,292

sTTIoNARY coNcAvE SCREEN Original Filed Feb. 12, 1940 6257 26H0 a 257\ ji @l E IN VEN TOR. WALL ACE f77/1 eREeoE @ECE/1550,

A TTORNEY.

Patented Oct. 15, A1946 i ".i 3.

, STATIONARYCQNCAVE SCREEN Wallace F. MacGregor, deceased, late ofRacine,

Wis., by Richard D. Miller, special administrator, Racine, Wis.,assignor to J. I. Case Company, Racine, Wis., a corporation Originalapplication February 12, 1940, Serial No. 318,504. Divided and thisapplication July 22, 1944, Serial No. 546,078

3 Claims.

The present invention relates to combination harvester thresherscommonly known as combines," and particularly to the general purposetype adapted for harvesting grain, beans, peas,

within bin 4 beneath tube 25| to collect the seeds and prevent theirmixing with the clean grain. In this way the seeds may be separated fromthe grain with the addition of very little mechanism over that alreadyon the combine.

and other crop growths, and which combine may 5 be readily transportedand operated by a tractor, Shaft |73 may be driven in any Suitable man'and an object of the invention is to generally imner, in the presentinstance by the elevator in prove the construction and operation ofdevices housing 93, and it is to be understood that Wellof this class,the present application being a known eXDedientS not Shown are providedfor division of applicants co-pending application, 1o Supporting theSeveral Ports in the relations Serial 318,504, led February 12, 1940,now ShoWn- Patent No. 2,354,346, July 25, 1944, The above being acomplete description of an A further object is to provide a machine ofillustrative embodiment of the invention, what this character limited insize and Capable of is claimed as new and desired to be secured byeicient operation with a minimum of manual at- Letters Patent 0f theUnited States is! tendance, 1. In a weed screen, the combination of a Afurther object is the improved ineens for tubular housingextendinginasubstantially horieliminating undesirable seeds from thecleaned Zohtai direction e Conveyor auger in the housing grain, anddisposed to propel grain containing unde- Other objects and advantageswill be apparent 2o Sirebie Peftioies through Said housing from end fromthe attaohed speeiiioation and accompanyto end thereof by virtue ofrotation of said coning drawing in which; veyor auger, said housingproviding an opening Figure 1 is a sectional View teken on the line inthe bottom Wall thereof, asleeve disposed about I l of Fig, 2, saidhousing so as to cover said opening, said Fig. 2 is an elevation of aweed screen attaoh- 25 Sleeve providing a plurality of sets of Screeningment, perforations of different sizes registerable with As seen in Fig,2, the combine includes a bin said opening as desired by rotation ofsaid sleeve 4 for receiving the harvested and cleaned grain, on Saidhousing' Said Sleeve being split lengththe grain being delivered fromthe separating Wise ianges extending along the margins 0f the mechanismnot shown, by an elevator of con- 3() split in said sleeve and means forforcing the ventional construction terminating in housing anges towardeach other for clamping the sleeve 98, through which passes a shaft |13.The grain ih Piace on the housing, Said sleeve being freely is thentransported through a housing Fig rotatable on the housing when theclamping 1, having an opening 252, in the present instance means isloose, and a receptacle disposed beneath by means of an auger 253mounted on shaft |13, said opening for receiving particles screened fromAuger 253 and its housing 25| are generally the grain through saidperforations. designated as 250 and serve to transport the 2- In e WeedSoreen, the Combination of a grain from elevator 98 partially across binli so tubular housing eXtending in rasubstantially horithat the graindeposited in the bin Wiii be zontal direction, a conveyor auger in thehousproperly distributed, 4o ing and disposed to propel grain containingun- The assemblage in addition to this function is desirable particlesthrough Said housing from end adapted to remove undesirable seeds fromthe to end thereof by virtue of rotation of said concleaned grain. Forthis purpose, the perforated veyor auger, Said housing providing anopening sleeve or shroud 254 encloses housing or tube 2.5i in the bottomWell thereof. a Sleeve disposed about and is preferably, although notnecessarily arsaid housing So as to Cover said opening, Said ranged tobe clamped thereabout as by flanges Sleeve providing a plurality 0f setsof screening 255 and 256 which may be forced toward each perforations ofdifferent sizes registerable with other as by bolts 251-251, sleeve 254may have said opening as desired by rotation of'said sleeve a pluralityof sets of perforations 258, 259 and on said housing, means for clampingthe sleeve 260, any one of which may be brought into register in piaceon the housing, Seid sleeve being freely With opening 252 by rotatingthe sleeve about rotatable on the housing when the clamping tube 25|-The perforations may be of several means is loose, and a receptacledisposed beneath sizes whereby they may be adapted to pass the saidopeningv for receiving particles screened weed seeds but not the grainbeing harvested. from the grain through Said perforations- A receptacle26| of any suitable form is secured 55 3. In a weed screen, thecombination of a tubular housing extending in a substantially horizontaldirection, a conveyor auger in the housing and disposed to propel graincontaining undesirable particles through said housing by virtue ofrotation of said conveyor auger, said housing providing an opening inthe bottom Wall thereof, a sleeve disposed about said housing so as tocover said opening, said sleeve providing a p1urality of sets ofscreening perforations of diierent sizes registerable with said openingasy desired 10 4 by shifting of said sleeve on said housing, means forsecuring the sleeve in place on the housing, said sleeve being freelyshiftable on the housing except when the securing means is operative,and a receptacle disposed beneath said opening for receiving particlesscreened from the grain through said perforations.

RICHARD D. MILLER, Special Administrator of the Estate of Wallace F.

MacGregor, Deceased.

